干旱区研究2025，Vol.42Issue(2)：289-298,10.DOI:10.13866/j.azr.2025.02.09
毛乌素沙地不同立地条件沙柳生物量异速生长规律
Biomass allocation in Salix psammophila and the response to different site conditions in the Mu Us Sandy Land
摘要
Abstract
This study aimed to clarify the adaptability strategies of Salix psammophila to different environments from the perspective of resource allocation for the stable construction and sustainable management of S.psam-mophila plantations.S.psammophila plantations in four types of sites(windward slope,leeward slope,interdune land,and flat sand land)were surveyed in the Mu Us Sandy Land in Ningxia.The characteristics of the S.psam-mophila population,including morphological parameters like basal diameter,branch length,and stem and leaf biomass,were recorded.The effects of topography on the biomass accumulation and distribution between the S.psammophila organs were studied based on the allometric growth model.(1)With growth,S.psammophila tends to reduce the proportion of leaf resources and increase the proportion of stem resources.(2)The site factors signif-icantly impact biomass and its distribution between the S.psammophila organs.The average biomass of branches in the dune(windward and leeward slopes)is significantly higher than that in the interdune land(P<0.05),and the allometric growth index of leaf-stem biomass is significantly higher in the dune than in the interdune and flat sand lands(P<0.05).(3)The main soil factor that affects biomass and its distribution between the S.psammophila organs is soil moisture.Soil moisture of the whole section(0-100 cm)determines the biomass,and soil moisture of the deep layer moisture content(60-100 cm)affects the biomass distribution trade-off between the stem and leaf.The biomass accumulation and allocation of S.psammophila displayed significant differences among differ-ent site types,and the effect of deep soil moisture on biomass allocation was more significant than that of full-pro-file soil moisture.In the future,artificial intervention can be adopted to satisfy the water requirement for S.psam-mophilagrowth and realize the stable development of the S.psammophila plantation population.关键词
毛乌素沙地/沙柳/生物量分配/立地类型/异速生长Key words
Mu Us Sandy Land/Salix psammophila/biomass allocation/site type/allometric growth引用本文复制引用
王岳,刘中华,于明含,贺宇,郝蕾,刘学瑶,安骁..毛乌素沙地不同立地条件沙柳生物量异速生长规律[J].干旱区研究,2025,42(2):289-298,10.基金项目
内蒙古自治区科技计划项目(2023YFHH0068) （2023YFHH0068）
国家自然科学基金项目(31700439,U23A2014) （31700439,U23A2014）
内蒙古自治区"五大任务"研究专项(NCXWD2472) （NCXWD2472）
